Landsmann



(No Model.) 7

J. R. MULLER-LANDSMANN. STEAM BOILER No. 545,370. Patented Aug. 27,1895.

vim MM, W%%@% M- Emm NITED STATES PATENT @hhifilis JAKOB RQBERTMllLLER-LANDSMANN, OF LOTZ WIJL, SWI'IZERLAND.

STEAM-BOILER.

SPEOIFICATIQN forming part of Letters Patent No. 545,370, dated August27, 1895.

Application filed March 14, 1895.

To all whom it may concern.-

Be it known that I, JAKOB ROBERT Miirmna LANDSMANN, a citizen ofSwitzerland, residing at Lotzwijl, can ton of Berne, Switzerland,haveinvented certain new and useful Improvements in Stea1n-l3oilers5 and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to certain improvements in steam-boilers wherebyperfect combustion of fuel is insured, as well as a thorough consumptionof all smoke and gases arising from same.

My invention is especially adapted for locomotiveboilers, inasmuch as itprovides for obtaining the greatest amount of heat from a limitedquantity of fuel.

The invention is fully illustrated in the accompanying drawings, whereonFigure 1 is a vertical longitudinal section of a locomotive-shapedboiler provided with my improvements. Fig. 2 isa vertical transversesection through the firebox thereof, and Fig. 3 a longitudinalhorizontal section of the boiler.

The section of Fig. 1 is made through the line 5t :1: of Figs. 2 and 3,the section of Fig. 2 is through the line 00 0c of Figs. 1 and 3, andthe section of Fig. 3 through the line in m of Fig. 2. p

The letter Ct designates the fire-box of the boiler, which is dividedinto compartments I II by means of a vertical longitudinal partition 5.The lower part of each compartment of the fire-box is provided at itsfront and rear with horizontal hollow supports Z) Z) for the grate-barse, the latter made hollow and provided at the under side of eachbearing-surface with openings 1 to match openings 2, formed in the uppersurface of the supporting-bars h b. The bars b b are connected at theirunder sides by pipes c, and

the sides of the grate-bars are provided with holes (1 for the passageof smoke and gases, as hereinafter more fully described. The support bhas the rear of its top surface turned upward and connected with thetubeplate f, so as to leave an air-space between same. This spacecommunicates with the Serial No. 541,773. (No model.)

smoke-chamber of the boiler by pipes g 9 over the forward ends of whichare fitted receiving air-pipes G G having outwardlyprojecting flaringmonths for the more ready admission of air. Dampers may be appliedwithin the pipes G G or in the mouths thereof for regulating the inflowof air should same be required.

The fire-box and smoke-chamber are connected above the pipes g g byfines h 7B, the flue h and air-pipe g and the fine 7L2 and air-pipe gbeing diagonally connected at the smoke-chamber end of the boiler, sothat the smoke and gases from grate I shall pass through flue 7L andreturn by pipe 9 mixed with fresh air, to the under side of the grate incompartment II and the smoke and gases from grate II escape through flueit" into air-pipe g and be conveyed by same, also mixed with fresh air,to the under side of grate I, by which means absolute combustion iseffected.

The dampers 3 4 of the ash-box are intended to be kept closed during theoperation of the invention, in order that the air admitted to thegrate-bars shall follow the course indicated by the arrows in Figs. 1and 3. The said air, entering the pipes G G passes rearwardly and isheated in thepipes 9' thence it passes downwardly to the gratesupportsZ) Z) and into the grate-bars e, escaping through the side holes clthereof, in a superheated state, into the fuel, and thus producingsmokeless combustion.

The pipes H H are provided with slides 't' to permit the smoke to escapethrough the smoke-stack when the fire is first started.

If desired, the tines h h and the pipes g can be provided withinjectors, ventilators, &c.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. The combination in a steam boiler, of ash-pits, a fire-box divided bya partition, an upper set of fines h, 7L2, and lower set of pipes g, gpassing through the boiler, the upper flues h, 72. are connected at oneend of the fire-chamber, and at the other to the diagonally opposite andforward end of the return pipes 9 g, respectively, said return pipesconnected to the ash pit, whereby the products of combustion from oneside of the divided furnace are transferred into the ash-pit of theother, substantially as described.

2. The combination in a steam boiler, of ash pits, a fire-box divided bya partition, an upper set of fines h, 7L2, and lower set of pipes g, 9passing through the boiler, the upper flues h, 7L2, being connected atone end of the fire-chamber, and at the other end to the diagonallyopposite and forward end of the return pipes g, g respectively, thereturn pipes connected to the ash-pit, as described, and the front endsof the pipes g, 9 pro- JB. ROB. ill'ULLElZ-EANDSMANN.

Witnesses:

O. HANSLIN, FR. W. MANL

